Sunday, September 22, 2013

CHEPTER-24 DIVERSITY & DISCRIMINATION CLASS-6

II TERM

CHEPTER-24

DIVERSITY & DISCRIMINATION
1-Qus- What is prejudice?

Ans-Prejudice is an unreasonable opinion about a person which is formed without much thought or knowledge.

2-Qus-What are some negative consequences of prejudice?
Ans-prejudice result in dislike or unfair behavior toward others based on such opinion .it limit our thinking & causes disharmony among people.

3-Qus- Define stereotype ?
Ans-A Stereo type is a fixed idea that people have about some one or something which is not true.

4-Qus-what are scheduled cast?
Ans-people who belong to there cast are known as scheduled castes.

LONG ANSWER

5-Qus-What is meant by discrimination? Explain with example
Ans the practice of making discrimination& treating a people less fairly thane others is known as discrimination for Ex- treating a person badly because they are not fair.

6-Qus-Why does stereotyping lead to backwardness of certain
Groups ?

Ans-stereotyping result in people discrimination against others people group’s communities etc unconsciously. They do not realize that there action are not based reason. Then they being to believe all the people belonging to this group are the same type.

7-Qus-How can you say that we all process multiple Identities?
Ans-we all progress multiple Identities because we all play different roles in our to day life. It changes according to the different people we interact with for Ex-we are brother, sister, son, father, etc, different people.

8-Qus-How did Dr .Ambedkar fight against discrimination?
Ans-Dr Ambedkar fought against all prejudice & fought for the right of the untouchable he leave active movement against untouchablity when India got independent  in 1947 Dr. Ambedker was made the chairman of the drafting committee.


Friday, September 20, 2013

Unit -2 separation of substances CLASS-6

Unit -2 separation of substances

Qus1-What is threshing? Explain the ways in which threshing is commonly done?

Ans the process of beating harvested crops to separate the grains from the stalks is called threshing. It is done manually (by hand) or with the help of machines


Qus-2What is winnowing? How is it done?

Ans-The mixture of chaff and grain is taken in a winnowing basket. The farmer stands at a higher level and lets the mixture fall to the ground. The grain, being heavier, falls almost vertically whereas the lighter chaff is carried away by the wind .the separated chaff is used as fodder for cattle.
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Qus3-What is hand picking? When is this method used?

Ans-Rice ,wheat, pulses, etc, that be buy from the market may contain impurities (unwanted or harmful particles ) in the form of small stones , un wanted grains ,etc, often  ,these impurities look very different from the food item and can be spotted easily. The method of separation used in such a case is hand picking.
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Qus4-Define saturated solution. How would you prepare a saturated solution of sugar in water?
Ans-a saturated solution is the solution in which no more of the solute can be dissolved?

If we keep adding spoonfuls of sugar to water and stir the solution each time we will notice some grains of sugar at the bottom of the solution. This shows that no more sugar can be dissolved. We say that the solution has become saturated.
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Qus5-How can the solubility of a substance be increased?

Ans-Solubility is the ability of a substance to get dissolved in a given liquid. The quantity of a substance that can dissolve in hot water is much more as compared to that in cold water there are some other factors that increase the solubility of a solute. We can observe this by taking two glasses of water and adding a whole sugar cube in one glass and powdered or crushed sugar cube in the other. Sugar in the powdered from dissolves first.
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Short answer questions,

Qus1 -name the different methods of separation?
Ans-sieving,thressing,winnowing,and hand picking
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Qus2-When can sieving be done?

Ans-the process of sieving is also used to separate pebbles and stones from and at construction sits.
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Qus3-Why is it not advisable to sieve wheat flour?

Ans-Sieving wheat flour is not advisable as wheat bran, which is removed during sieving, is very rich in nutrients and is also a rich source of fiber. It is better to remove visible impurities by hand picking.
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Qus4-Differentiate between sedimentation and decantation
Ans-The process of separating insoluble solids suspended in a liquid by allowing them to settle down is called sedimentation
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Qus5-What is filtration? Give two common examples of filtration?

The process by which two substances (an insoluble solid and a liquid) are separated by passing the mixture through filtering devices is called filtration.

Ex- After preparing tea, we filter out the tea leaves using a strainer. Filtration is also done to remove pulp from fresh fruit juice.
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Qus-6 How is a solute different from the solvent? Give two examples of common solute?

Ans- the substance that dissolves is called the solute and the substance in which the solute dissolves is called the solvent. The resulting mixture is called the solution.
Ex- sugar +  water =  sugar solution




Chapter-3 The seed of a revolution,CLASS-6

Chapter-3
The seed of a revolution

Q-1 Why is the term Neolithic revolution used to describe    the Neolithic period

The term Neolithic revolution is used to describe the Neolithic period because the transition from a hunting gathering lifestyle to the settled farming had been into dud in the period.

Q-2-How did the Domestication of animals help people?

Ans-the domestic of animals helped people in various ways
These animals provided continuous supply of milk, meat and other dairy product.
There skins were used as a cloth.
There are also helped in farming.

Q-3What were the early uses of wheel?

Ans-the early man used wheel for making potter, carts, and chariots of transportation and carrying loads.
Q-4 how have archeological divided the periods of study in Mehrgarh.

Ans-  Archeologist have  divided the site in to seven periods  the first seeing the pre pottery Neolithic periods that dates to about 7000 B.C. by  hand made pottery made and appearance . the least time period was 2500
B.C.TO 2000 B.C.

Q-5What are the main features of the Chalcolithic Age?
1-The main feature the calcolithics people saturate the uses of copper tools
2-people used while turned pottery decorated them beautiful designs.
3-spinning weaving was also done in some communities.

Q-6What are some of the reasons given for the beginning of agriculture in the Neolithic age?

Ans-reasons for the beginning of agriculture of are increased in the human population.
As the climate became warmers.
People did not want to travel long distance in search of food.

Q-7 Write a note on the social life of the people during Neolithic age ?

Ans-social life is Neolithic
People began to live in small village
New custom ceremonies emerged

People were engaged in various tast.   

CHAPTER-13- THE EARTH IN THE SOLAR SYSTEM CLASS-6

CHAPTER-13-
THE EARTH IN THE SOLAR SYSTEM
Q.1-Brifly defines universe and galaxy?
An- the universe is the boundless expanse in which matter star, planets, satellites, etc, exist.
Many groups of stars were formed which we call galaxies.
Q.2- what do you understand by solar system?

An- A solar system that house, planet, moon, stars, comets, asteroids, and other have bodies.

Q.3- defines the term constellations?
Ans-A group of stars the form a recognizable pattern in the sky.

Q.4- what according to you makes the planet earth unique?
Ans- the earth is unique planet in the solar system because it supports life.

Qu5.- what is an asteroid ?
Ans-pieces of rocks found orbiting the sun in a belt between Mars &Jupiter.
Long answer

Q.6- How is a comet different from an asteroid?
Ans- Comet-Balls of dust , ice particles and frozen gases visit our solar system in a periodic manner.
Asteroid- pieces of rocks found orbiting the sun in a belt between Mars &Jupiter

Qu.7-Explain what you understand by the waxing and waning of the moon.
Ans-  the term refers to the different shapes of the moon you have just read that the moon takes about 28 days to go around the earth the shape of the moon  grows during one half of this period , which is called the waxing period. And reduces during the other half which is called waning period. 

Q.8-Explain what a meteorite is?
Ans- Meteors – piecesof rocks that enter the earth’s atmosphere and generally burn out to friction with the earth’s atmosphere.    

Q.9- Why is the earth a unique planet?
Ans-the earth is a unique planet in the solar system because it supports life. This is possible because of the following reasons
1- About 3/4th of the surface of the earth is covered with water and that is why it is also referred to as the watery or blue planet.
2-The earth’s atmosphere has adequate amount of oxygen, which we breathe
Gases-nitrogen ,carbon dioxide and some others that are present In small amount  in the atmosphere- are critical for life on earth , ozone in the atmosphere  protects us from the harmful ultraviolet rays of the sun .
The land has sol that supports plant life and other living thing.    


 


Ch-16 Maps& maps reading CLASS-6

Ch-16 Maps& maps reading
Short answer

Q.-1Why do maps have an advantage over gloves? Give two reasons.

An-Maps are more useful then globe because it shows detail of smaller aria.
The maps are very handy so we can carry it easily.

Q.-2 what is the important of a scale on a map?

Ans-the scale is ratio of a distance between two places on maps it helps us to find out the distance between two places on a map.

Q.-3 what do you understand by cardinal points?

Ans-the forth major direction north (N) south(S) east (E) west (W) these direction are called the cardinal point or direction.

Q-4 what is the need to have conventional or maps sings in the maps?

Ans-most maps all over the world use sings & symbol because it will help the people of different countries who speak different language.

Q-5what is north line?

Ans-A map which has an arrow with N written on top this line is called north line.
LONG ANSWER
Q-6 what is a plane? How is it different from a sketch?

Ans- Plane  is drawing of small aria on a large scale layout of building  it show layout of building part has petals these are accurate drawing that are made by architects.

Sketch- this is a rough drawing to show the location of the place is show shop on a street across your home or temple on the foreside of your home. Sketches have no scale to give accurate measurement of distance.

Q-7 explains a map scale with an example?

Ans-ratio of the distance between two places on a map and the actual distance between the same two places on the ground ex: 10 k.m

Q- 8 Explain a large and small scale maps?
Ans-The map which cannot show the detail is called small scale map ex: when 1 c.m. on map shows 200km.
The map which shows the detail is called large scale map for

ex: 1 c.m. represent I k.m.

What is prehistory



1-What is prehistory?
Ans: prehistory is the study of history when people do not know to read and write.
2-What are the main sources of history?
Ans:The main sources of the history are archaeological (monuments, object, and inscription and edict)and literary (manuscript and literatures). 
3-What are monuments?
Ans: monuments are old building, forts, palace temples, or tomb, built by different rulers they are useful sources of information which help us to under stand more about an era or rulers.   
4-What is manuscript?
Ans: A manuscript is a hand written record of information  .this could be in the form  of a letter on leaves and bark of trees or scrolls. 
5-What information do we get from the coins?
Ans : coins contain legends an d inscription giving archaeologists details about the names of rulers  and the period of the reign.
6-What is history? How does the study of history help me?
Ans: history is the study of the past, the study of history helps us to know the people and lifestyles, customs and traditions festival and other important information of the past. It also helps to un fold 
7-What is archaeology? Give two examples of archaeological sources?
Ans: Archaeology is the study of past cultures and how people lived, based on the material remains left by people long ago. Two examples of archeological sources are monument and object. they are reliable sources of information as they were written during the religion of king and most them a still interact to day.  
 
8-What are inscription? Why are they reliable sources of information?
Inscriptions refer  to writing  and texts carved on solid object like pillars, wall of temple ,forts,caves,palaces,stone or copper tablet etc .they are reliable sources of information as they were

Ans:9-Why are accounts of foregain  travels important to us?
Ans:Account of foreign travelers are important to us because
They give information about lifestyles of people and the society they give information about political and economic condition they
They also describe religion practices beliefs.     

Chapter- 2 the earliest societies CLASS-6

Chapter- 2  the earliest societies

1-Who are hominids?
Ans:The biological family consisting of early human, apes and creatures resembling human beings were called hominids.

2-Why did early human move from place to place in search of food and water?
The early human move because:
(i)He did not know how to grow their own food?
(ii)He was depended upon the animals, so he was compelled to move with them.
(iii)To escape the harsh climatic condition. 

3-Why was stone used to make tools in the prehistory period?
Ans: stone was used to make tools because:
It was easily available in the nature. It was hard and could be shaped in to any size.
4-Name any three tools used in the Paleolithic age?
Ans:Three tools used in Paleolithic age were.
(i) hand axe
(ii) blades
(iii )burins

5-Name any two mesolinishis settlement in India?
Ans:two mesolinishis settlement are:
Pratap Gragh in U.P.
Billphan pur in west Bengal

6-What are the sources of information about the prehistory period?
(i)The sources of information about the prehistory period are:
(ii) Monuments and building.
(iii) Coins and ornament.
(iv) Weapons.
(v) Paintings.
(vi) Pottery and tools.
(vii) Inscriptions and edicts.
 7-What did early human eat?
Ans: early humans ate
(i)Meat hunted animals.
(ii)Gathered fruit
(iii)Root
(iv)Berries and nuts.
(v)Honey
8-How was fire useful to early human?
Ans;Fire was important to early human as it.
(i)help to cook food.
(ii) Kept than warm during winter.
(iii)Kept away animals from them.
 9-What is the significance of the rock shelter of bhimbetka?
Rock shelter bhimbetka are significant because cave carvings give us gigantic insight into the life of prehistoric people .
The paintings elepictstick  figures choosing and hunting animals.
Some panting sho yang and old people dancing and performing riturals.
They depict the use of man colour like with ochre or red and white.


  



CHAPTER- 23 UNDERSTANDING DIVERSITY CLASS-6

CHAPTER- 23 UNDERSTANDING DIVERSITY 


Q1-Why do you mean by economic different?

Wealth creates  economic different , making some  people poor, different in income lead to inequality & effect people in many way –from meeting their basic need like food ,clothing ,& shelter.

Q2-Why India is called the land of unity in diversity?

Diversity makes the Indian culture one of its oneness which has been proven in the past in our struggle for freedom from the British rule.
Q3-Why is Indian known as a secular national?

India is land of many religion –Hinduism, Islam, Sikhism, Christianity, Buddhism, Jainism est. our constitution declares India to be a secular nation which equal respect being given to each religion.

 Q4-What is the linguistic diversity of India?
Ans-In addition of this linguistic diversity has a wide geographical diversity. There are five main physical divisions the great mountain wall of the earth, the indo genetic plains, the desert regions of the west, the costal plains and the island

(Andman &Nicobars&Laksh deep)

Wednesday, August 28, 2013

How big is a comet nucleus ?

How big is a comet nucleus ?
Comet nuclei come in a range of sizes. Most are between a few and ten kilometres in size while the largest ones have an average size of
about 20 km. The comet nucleus is nearly 50 % water ice and therefore the typical density may be around 1 gm/c.c. Thus an average comet has a mass that is billion times smaller than that of the earth. The nucleus of comet Halley was found to be peanut shaped by the spacecraft Giotto, 15 km long and 8 km cross section. Almost all the comet nuclei whose shapes have been determined, have a similar shape.

Where do comets come from ?

Where do comets come from ?
Trillions of comet nuclei are stored at the edge of our solar system. This cloud of
comets, called the Oort cloud in honour of the Dutch astronomer who proposed this idea first. It is thought to be at a distance of more than one trillion kilometers (one followed by twelve zeros) from the earth and the sun. Comet nuclei may also be found in a second location that is much closer viz., the Kuiper belt, a region between the
orbits of Neptune and Pluto. About a billion comets may be stored here. Notice that both locations are very far away from the sun. At the low temperatures found at these locations comet nuclei remain frozen mud balls! They are so tiny and so dark that they cannot be detected even with the most powerful telescopes at these distances.